Gregory J. Knudson, M.D.
Diagnostic Radiology Physician · Appleton, WI
Gregory J. Knudson, M.D. is a diagnostic radiology physician with a practice address in Appleton, Wisconsin, and NPI 1457395519, issued on Jun 16, 2006. Check the license (Wisconsin 29727, as entered in NPPES) on the Wisconsin Medical Examining Board; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Gregory J. Knudson
- Credential
- M.D.
- Primary taxonomy
- Diagnostic Radiology Physician 2085R0202X
- License number
- 29727 WI
Self-reported in NPPES; status is on the state search - Practice location
- 2500 E Enterprise Ave, Appleton, WI 54913
- Phone
- (920) 739-5642
- Enumerated
- Jun 16, 2006
- Record last updated
- Apr 3, 2008 (not updated in 18 years: call before relying on the address or phone)
- Fax
- (920) 968-0259
- Medicaid ID
- 31529000 WI
- Entity
- Type 1 · individual
Also registered at 2500 E Enterprise Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Stephen Bejvan, M.D.Diagnostic Radiology Physician1356379762
- Timothy Bernauer, M.D.Diagnostic Radiology Physician1609815265
- Keyvan Gharabeighlou, D.O.Diagnostic Radiology Physician1376588202
- Brian Hebl, M.D.Diagnostic Radiology Physician1578599684
- John Iglar, M.D.Diagnostic Radiology Physician1760419519
- Meghan Lacey, LPCMental Health Counselor1679949713
Verify Gregory J. Knudson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 29727Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Diagnostic Radiology Physician providers in Wisconsin
There are 1,005 diagnostic radiology physician records in Wisconsin. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
Other diagnostic radiology physician records in Wisconsin
- Ibrahim AbdallaMadison, WI1467266809
- James Aceto, M.D.Mequon, WI1609858158
- Mohit Agarwal, MDMilwaukee, WI1265864169
- Sarah Agnew, RT (R).Madison, WI1730742776
- Serra Aktan, MDMadison, WI1427589662
- Maysoon Al-Hihi, MDMilwaukee, WI1093741399
- Giustino Albanese, M.D.Madison, WI1265634307
- Philip Albert, M.D.Wausau, WI1073619623
- Saad Ali, M.D.Milwaukee, WI1467617662
- Hailey Allen, M.D.Madison, WI1619235157
Common questions
What is Gregory J. Knudson, M.D.'s NPI number?
Gregory J. Knudson, M.D.'s National Provider Identifier (NPI) is 1457395519, issued on Jun 16, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Gregory J. Knudson, M.D. located?
The NPPES record lists a practice address at 2500 E Enterprise Ave, Appleton, WI, 54913. Phone: (920) 739-5642. Providers update this record themselves, so call before visiting.
How can I verify Gregory J. Knudson, M.D.'s license?
NPPES lists Wisconsin license number 29727, as entered by the provider. Search the Wisconsin Medical Examining Board at https://dsps.wi.gov/Pages/BoardsCouncils/MEB/Default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.